[MacPorts] #53173: py-pyobjc: fails to build on 10.6, uses 10.7 SDK; stdarg.h: No such file or directory

[MacPorts]

#53173: py-pyobjc: fails to build on 10.6, uses 10.7 SDK; stdarg.h: No such file or
directory
-------------------------+-----------------------
 Reporter:  mojca        |      Owner:
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:  snowleopard  |       Port:  py-pyobjc
-------------------------+-----------------------
 It looks suspicious that the build is trying to use the 10.7 SDK:

 {{{
 /usr/bin/gcc-4.2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -arch
 i386
 -I/opt/local/Library/Frameworks/Python.framework/Versions/3.6/include/python3.6m
 -c Modules/objc/OC_NSBundleHack.m -o
 build/temp.macosx-10.6-i386-3.6/Modules/objc/OC_NSBundleHack.o
 -DPyObjC_STRICT_DEBUGGING -DMACOSX -DPyObjC_BUILD_RELEASE=1006 -DMACOSX -g
 -fexceptions -Wall -Wstrict-prototypes -Wmissing-prototypes -Wformat=2 -W
 -Wpointer-arith -Wmissing-declarations -Wnested-externs -W -Wno-import
 -Wno-unknown-pragmas -Wshorten-64-to-32 -Ilibffi-src/include -Ilibffi-
 src/powerpc -isysroot /Developer/SDKs/MacOSX10.7.sdk
 In file included from
 /opt/local/Library/Frameworks/Python.framework/Versions/3.6/include/python3.6m/Python.h:75,
                  from Modules/objc/pyobjc.h:11,
                  from Modules/objc/OC_NSBundleHack.m:1:
 /opt/local/Library/Frameworks/Python.framework/Versions/3.6/include/python3.6m/bytearrayobject.h:9:20:
 error: stdarg.h: No such file or directory
 }}}

 Here's the [https://build.macports.org/builders/ports-10.6_i386_legacy-
 builder/builds/13135 full log].

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Ticket URL: <https://trac.macports.org/ticket/53173>
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